Account mapping from Parent to Child

Hi Team,

I have an Account field in Opportunity object, I have to set this account details in to one more landing page as a default value.

When I write the below code, Account from Opportunity is not mapping to the target object. Please suggest on how to proceed.

Code:

========

defaultValues: [{

                            name: ["UsrOppLookup"],

                            value: [this.get("Id")]

                        },

                        {

                            name: ["UsrAccount"],

                            value: [this.get("Account")] // Account is the DB name for Account column in Opp  

                        }]

Thanks,

Suresh.